Glowing headers question
Thread Starter
Staging Lane
Joined: Nov 2001
Posts: 61
Likes: 0
From: Southlake, TX
Glowing headers question After installing a CATECH ported TB I noticed that my headers were cherry red. When I started up the engine the first time after installing the TB my RPM's was around 3K. I let it run that way to let the computer learn about the new TB. I also had my ATAP going. I was looking over the LTRM (+5)and STRM (0.1) which looked good. I take a look at the TB to double check I installed everything and the headers were RED! I'm pretty sure it's not the TB as I recently went through an inspection and the smell was the same with a MMS TB. Any ideas?
TIA
-Allen
TIA
-Allen
Re: Glowing headers question a freind of mine had this same trouble and it turned out to be an exhaust valve hanging up. this builds a LOT of exhaust pressure and heat. how does the car run? getting any pre-ignition. someone who has a better idea, please chime in. i have heard a lot of different type of answers for the glowing hot header.
Thread Starter
Staging Lane
Joined: Nov 2001
Posts: 61
Likes: 0
From: Southlake, TX
Re: Glowing headers question Thanks for the reply's. The car runs extremely well. Each tube glows the same, so I don't think I hurt any valves. On a side note, the ceramic coating on the TTS headers still look good after their glow in the dark impression.
I had something similar happen on my 67 big block after a cam change. Seems I had the timing retarded way to much. Don't think thats the problem here.
-Allen
I had something similar happen on my 67 big block after a cam change. Seems I had the timing retarded way to much. Don't think thats the problem here.
-Allen
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Launching!
Joined: Dec 2001
Posts: 231
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From: North Tonawanda - New York
Re: Glowing headers question [quote]Originally posted by Pro Stock John:
<strong>You are running lean.</strong><hr></blockquote>
I'll second that ! Running lean will cause your headers to run red.
<strong>You are running lean.</strong><hr></blockquote>
I'll second that ! Running lean will cause your headers to run red.
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Launching!
Joined: Nov 2001
Posts: 271
Likes: 0
From: Wilmington DE
Re: Glowing headers question How long was your car sitting idling at 3000 RPM? It could just be that with the idle so high, and no air flow around the engine/headers, they just got hot. Headers are known to glow red when a car is sitting stationary with the engine running for a while, especially at higher engine speeds. Do they glow after driving it around? If they glow all the time, it is probably leaned out like the others have said...
Thread Starter
Staging Lane
Joined: Nov 2001
Posts: 61
Likes: 0
From: Southlake, TX
Re: Glowing headers question I was doing a idle relearn so it was about 10 minutes or so. Your probably right that there was not enough air going around them.
PSJ, have question for you. Without the MAFT my LTRM is +25. What could be making it so lean?
Thanks
-Allen
PSJ, have question for you. Without the MAFT my LTRM is +25. What could be making it so lean?
Thanks
-Allen
Re: Glowing headers question Allen-
I just looked at your mods.
Ported MAF ends will cause your combo to run lean. The pcm cannot compensate more than 25% + or -.
I personally would not be happy with my Ltrims going over 10%. IMO, 10% is okay, because you still have some headroom.
Lean is mean. Lean makes power. But you can also get detonation. I bet the plug tips are white. Might even see some speckles from detonation.
For sure keep using that MAF T or do what you have to do to keep the Ltrims from pegging like that.
I just looked at your mods.
Ported MAF ends will cause your combo to run lean. The pcm cannot compensate more than 25% + or -.
I personally would not be happy with my Ltrims going over 10%. IMO, 10% is okay, because you still have some headroom.
Lean is mean. Lean makes power. But you can also get detonation. I bet the plug tips are white. Might even see some speckles from detonation.
For sure keep using that MAF T or do what you have to do to keep the Ltrims from pegging like that.
